After introducing iOS 10 to the world this morning at WWDC 2016, Apple let it be known that the operating system would be delivered to developers this afternoon. Once this Developer Preview is launched, later this year there'll be a Public Beta. That's the release you, the reader, will most likely want to be getting in on. Unless you don't like it when software has a big likelihood of not working precisely how you expect it to work. Hence the Beta.